Cervical length

Dr Henry Knipe and Radswiki et al.

In obstetric and gynecological imaging, the cervical length is defined as the distance between the internal cervical os and the external cervical os.

Radiographic assessment

  • the cervical length is most accurately assessed on a transvaginal scan with an empty bladder
  • in a normal gravid situation, the cervical length is considered to be at least 30 mm (3 cm)
  • the presence of a full bladder can increase the cervical length particularly on a trans-abdominal scan

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Article information

rID: 14970
Tag: cases
Synonyms or Alternate Spellings:
  • Cervical length (CL)
  • Length of the cervix
  • Length of the uterine cervix
  • Length of uterine cervix
  • Uterine cervical length

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